Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 2,095

**7th grade math**

A farmer grows 196 pounds of potatoes. He sells them to a grocer who divides them into 5 pound and 20 pound bags. if the grocer uses the same number of 5 pounds and 20 pound bags, how many bags of each did he use?

**Chemistry**

Sulfur trioxide, SO3, is made from the oxidation of SO2, and the reaction is represented by the equation 2SO2 + O2 2SO3 A 25-g sample of SO2 gives 18 g of SO3. The PERCENT YIELD of SO3 is?

**Chemistry**

A clear colorless liquid in an open beaker was heated to boiling. The liquid began to boil at 110°C, and as vapors escaped, the temperature of boiling gradually increased to 115°C, at which the heating was stopped. On the basis of this information, we can say that the ...

**Chemistry**

A sample of an oxide of antimony (Sb) contained 25.0 g of antimony combined with 8.2 g of oxygen. The simplest formula for the oxide is?

**Chemistry**

C3H8 + 5O2 3CO2 + 4H2O How many grams of oxygen are required to burn 7.0 g of C3H8?

**Chemistry**

Ammonia, NH3, and oxygen can be reacted together in the presence of a catalyst to form only nitrogen(II) oxide and water. The number of moles of oxygen consumed for each mole of NO that is produced is?

**Chemistry**

How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 × 102 mL of 2.00 × 10–1 M solution?

**Math-Alebra**

Oops, forgot he wanted to play 14 commercials altogether. If he did play only 30 sec. commercials he would be over 14. For both 30 and 60 sec. commercials. You would have to set up some sort of equation.

**Math-Alebra**

For the first problem change 11 min to seconds by multiplying by 60. Because there is 60 seconds in one minute. 11 min. * (60 sec./1 min) = 660 sec. So for 30 sec. commercial 660/30 = 22 commercial For 60 sec. commercial 660/60 = 11 commercial

**Algebra 2**

It's really Natural Logarithm I would recommend looking at the rules for both Logarithm and Natural Logarithm.

**Algebra 2**

Using quotient rule of logarithms ln(m/n) = ln(m) – ln(n) so ln(1)-ln(2) = ln(1/2)

**Alg 2**

One way it helps to look at roots of 3rd degree is that it's the same as the what is under the root to the power of (1/3). Ex: (3√x)= x^(1/3) I would then do this with a higher polynomial like (3√x^5)= (x^5)^(1/3) = x^(5/3)

**calculus**

Thanks Helped a lot

**calculus**

I set both y equal to each other to find the points of integration. squared both sides (((25-(x^2))^(1/2))=3)^2 then becomes (x^2)=25-9 Result x= +(14^(1/2) and -(14^(1/2) I don't know what to use, as in the disk or washer method.

**calculus**

Find the volume of the solid when the region enclosed by the curves y=((25-(x^2))^(1/2))and y=3 is revolved about the x-axis. I already have the answer = (256*pi)/3, but don't know how to set up.

**Physics**

pA = pB = 2 atm = 2 * 101325 Pa = 202650 Pa vA = 1 L = 1 * 10^-3 m^3 vB = 5 L = 5 * 10^-3 m^3 W(A to B) = 202650 * (5 * 10^-3 - 1 * 10^-3) = 202650 * 4 * 10^-3 = 810.6 J W(B to C) = 0 (because volume is constant) W(in complete cycle) = 480 J W(in complete cycle) = W(A to B) + ...

**5th grade**

Thanks. I thought a square would not be classified as a rectangle.

**5th grade**

I need to have 7 and have already used up the whole numbers 1X13, 2X12, 3X11, 4X10, 5X9, 6X8, so what is the 7th rectangle measurement????

**5th grade**

If I have a perimeter of 28 inches, how many rectangles can I draw and what are the dimensions?

**chemistry2**

if 160g of Al reacts with O2 to produce 260g of Al2O3.calculate the theoretical yield and the percent yield 4Al+3O2 2Al2 O3

**Chemistry**

What is the pH of 50.0 M HF and 25.0mL of 1.0 M NaOH?

**PHYSICS**

A sample of monatomic gas (ã = 5/3) is expanded adiabatically from an initial temperature, volume, and pressure of 230. °C, 7.00 litres, and 7.00 kPa, respectively, to a final volume of 10.0 litres. (a) What is the final pressure of the gas? (answer 3.86 kPa) (b) Ho...

**math**

the statue of liberty is 150 feet tall, and stands on a 150 foot pedestal. How far from the base should you stand to have the statue subtend the largest possible angle at your camera lens, assuming the camera is held 5 feet off the ground and the ground is flat?

**8th grade**

what it he reason a spoon gets hot when put in a bowl of hot soup?

**Physics**

it didnt let me put the link to image.. A tube of radius 5 cm is connected to tube of radius 1 cm as shown above. Water is forced through the tube at a rate of 10 liters/min. The pressure in the 5 cm tube is 1×105 Pa. The density of water is 1000 kg/m3. Assume that the w...

**math**

mikes average on the first four exams in econ 1A is 88. what must he earn on the next exam to raise his overall average to 90

**Trigonometry**

1. Find the exact value of the following (Think identity) Cos(2 Arccos(5/13)) 2. Solve the following equation for 0° ≤ Θ < 360° Sec(Θ)= tan(Θ) + cos(Θ)

**algebra**

the area of the parallelogram is 96 square miles. Find its base and height. if the base is x+5 and the height is x-5

**IT**

Design a system which will take in the results for the five criterion levels of achievement for each phase of the design cycle: Investigate, Design, Plan, Create and evaluate. The system will then calculate the average and round up to the nearest decimal place. It will then di...

**english**

i think its a

**english**

n which one of the following sentences does the verb agree with the subject? A. The book that explains the plays is on the shelf. B. There is a million reasons why I shouldn’t go. C. Who is the people in the photograph? D. Here is the reasons we can’t start the car.

**Acoustics: Noise Vibration and Noise Control**

Hi there mate, sorry late reply. I havent really got any further. And my tutors dont really understand it. Have you?

**Acoustics: Noise Vibration and Noise Control**

Helicopter Noise Transmission It is planned to introduce a regular helicopter service from a helipad at ground level in a hospital premises. There will be four arrivals and four departures per day but never more than one arrival and one departure in any hour. There is a school...

**trig**

suppose that sin(x) + cos(x) = 4/3 a)square this result and find a value for sin(x)cos(x). b)using the result from a) find the exact value of sin^3(x)+cos^3(x). (Hint: Do you recall how to factor x^3 + y^3)

**chemistry**

In a certain chemical reaction 1.00 gram of product is produced in 15 minutes when the reaction is carried out at 20oC. Assuming that there is sufficient starting material available, how much product will be produced in the same length of time if the reaction is carried out in...

**chemistry**

In a certain chemical reaction 1.00 gram of product is produced in 15 minutes when the reaction is carried out at 20oC. Assuming that there is sufficient starting material available, how much product will be produced in the same length of time if the reaction is carried out in...

**Management of Information Sy**

Assignment: Hardware Replacement Project The IT department is implementing a new CRM solution to its corporate offices. The hardware currently in use is out of date and will not support the CRM application. The hardware must be replaced prior to deployment. • Resources: C...

**Physics Help Please!**

The change in temperature is 12 deg C if it rises from 15 to 27 degrees. 1. Find the mass of water from volume of water times its density. 2. Find the heat in Joule needed from Q=mct where m is mass of water, c is specific heat capacity and t is rise in temperature. Then the c...

**Physics**

Work done is force times distance moved. In 6 seconds, at 4m/s the box moves___m Force times distance = ______

**Chemisty**

Using slater's rules: S = 4.15 Zeff F^- = 4.85 Zeff Na^+ = 6.85 *these answers are in e^-(electrons)*

**Physics**

An ideal gas is squeezed slowly from state A (pressure-600 kPa, volume- 1 L) to B ( pressure-400kPa, volume- 0.5 L). What is the work done or received by the gas?

**Penn Foster Writing Assignment Writing Skills**

Could any one help me with this maybe email me and walk me through so steps!!

**Penn Foster Writing Assignment Writing Skills**

I have to do the same thing but im a little slow when it comes to writing so i have know idea what to do. Also i have know idea what have of this stuff is even though i took some test and still read it.

**Penn Foster Writing Assignment Writing Skills**

I have to do the same thing but im a little slow when it comes to writing so i have know idea what to do. Also i have know idea what have of this stuff is even though i took some test and still read it.

**math**

is the answer 12

**math**

A cyclist and a jogger start from a town at the same time and headed for a destination 24 mi away. The rate of the cyclist is twice the rate of the jogger. The cyclist arrives 3hrs ahead of the jogger. Whats the rate of the cyclist?

**college chem**

To solve this, you require the Henderson-Hasselbach equation: pH = pKa + log(conc.base/conc. acid) You have pH and pKa, so plug in the numbers, and solve for the ratio of Base/acid. With some algebra, you can then figure out the volume amounts of each species.

**5th grade**

how can 2and2 3thirds be equal to 16 sixths

**Accounting**

using the financial statements of landry's restaurant located in appendix a of the text fundamentals of financial accounting 1st ed by phillips libby and libby compute teh following ratios for 2002 and 2003 a. Return on Equity b. Inventory Turnover I cannot locate in Appen...

**Statistics**

Choose the right answers, and provide reasons and calculation To study the effect of change in price of a DVD ($) on the total profit (000, dollars), the analyst of an electronic firm randomly selected 13 retail sales stores. She used the data on total profit (y) and DVD price...

**Statistics**

Choose the right answer, and provide the reasons and calculations. A palmist claims that he can accurately predict the age at death (y) of an individual from the length (centimeters) of age line (x) on the right hand of the individual. A random sample of 20 dead individuals fr...

**Statistics**

Choose the right answer, and provide the reasons and calculations. A palmist claims that he can accurately predict the age at death (y) of an individual from the length (centimeters) of age line (x) on the right hand of the individual. A random sample of 20 dead individuals fr...

**Business Communications**

Which of the following sentences uses passive voice appropriately? A:"Your order was shipped yesterday and should arrive Friday." B:"The shipping clerk sent your order yesterday and it should arrive by Friday." C:"The decision was made after much debat...

**Chemistry**

.445 L

**Math**

Use the fact that (125)^1/3 = 5 and the tangent line approximation to estimate (123)^1/3

**Accounting**

FIN 200 Checkpoint: break even analysis

**pre alg**

-8/75

**Math 98 pre algebra**

thank you

**Math 98 pre algebra**

14 and 2/3 times 2 and 2/11 divided by 3 and 3/8. i got =234 and 1/4 am I correct and if not what is the answer?

**math**

40 is what percent of 800

**math**

8.02-3.696

**Geometry**

cos x°=15/17 tan 76°=13/x

**Physics**

Two point charges, 5.0 µC and -2.0 µC, are placed 5.0 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and the 5.0 µC charge is at x = 5.0 cm. At what point(s) along the x axis is the electric field zero? I'm not exactly sure how i s...

**Math**

a circular track runs around a park. there is a sidewalk that connects two points on the track that runs through the center of the park. the sidewalk is 100 ft. long. How long is the track to the nearest half foot?

**Math**

I see it now,because a diagonal divides a parallelogram into two congruent triangles! Thank you!!

**Math**

So one side of the rhombus is equal to seven? I'm still confused as to how you got your answer...

**Math**

In rhombus DEFG, if m<DEF=60, and the shorter diagonal DF has a length of 7, find the length of the side of a rhombus.

**Geometry**

In rhombus PQSR, PQ=y+8 and QS = 4y-7. Find PQ. Also... In rectangle ABCD,AB=x+15, BC=x-8, and CD=2x+3. Find: 1)x. 2)AB 3)BC Thanks!

**chemistry**

When one pound of gasoline (made up of compounds of hydrogen and carbon) is burned in an automobile approximately 3 pounds of carbon dioxide, CO2, is given off. Carbon dioxide is one of the gases contributing to global warming. What information from this experiment helps expla...

**Math**

5 didnt

**Chemistry**

Can someone explain hybrid structures and resonance structures.

**French**

I really do not know how to unscramble these two french olympic winter game words. They are: NDIIMOCORBQUENE and UPSOCEETRTI. Could you please help me?

**math **

in a balloon race,the sum of the distances covered by two of the balloons was 1,025 miles.if the distance covered by the first balloon was 50 miles more than 1/2 of that covered by the second balloon,how far did each travel?

**math**

at the town waterworks,2 large pumps and 4 smaller ones delivered 4,800 gallons of water a minute.each of the large pumps delivered 4 times as much water as each small pump.how many gallons per minute did each pump deliver?

**math**

a man paid $8.50 for a small pump and 8 feet of tubing.he paid 12 times as much for the pump as for each foot of tubing.how much did the pump cost? the tubing?

**Physics**

An electron moving to the right at 3.0% the speed of light enters a uniform electric field parallel to its direction of motion. If the electron is to be brought to rest in the space of 4.5 cm, determine the following. What direction is required for the electric field? What is ...

**5th grade science**

How might the history of the US be different if the first European settlements had occurred on the west coast instead of the east coast?

**Chemistry**

in this experiment you are you will begin by preparing a dilute soultion of sodium hydroxide by taking 50 ml of 3 M NaOh stock solution and diluting it with 250 ml of water. i found that and the answer was .5 but how do i do this b. calculate the number of moles and grams of o...

**Global History**

Thanks, Ms. Sue!

**Global History**

So, in this way, the British became imperialistic over Ireland? The British supressed Ireland's rebellions only to keep making the Irish export wheat and Barley?

**Global History**

How does the English government's attitude toward the Irish during the Irish famine in the late 1840's reflect the motivations for imperialism?

**chemistry**

I believe it comes out to CaSO4 x 2H20 20.9% 2:1 ratio I think haha

**Chemistry**

oh and thank you guys

**Chemistry**

nvm its -545. not quite sure why its exothermic

**Chemistry**

i get 545 but i'm not getting the right answer

**Chemistry**

btw, i meant to write 11.9C not 119. i work it like this: 200ml(1g/ml)(4.184J/C)(11.9C) then divide by (40.078g/mol/.732g) i get the wrong answer though

**Chemistry**

What is the molar heat of reaction? When 0.732 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 119C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay atten...

**chemistry**

Looking up the specifications of an oil online, the spec sheet indicates that the specific gravity of this oil is .93. Does this mean that the oil weights .93 grams / 1 cubic centimeter of oil? Thanks

**11th grade**

Why is square root of x squared = absolute x? Is it because absolute x = -x and x?

**geography**

how come 10% of the land could be used to grow crops on ancient china

**Physics 2**

A cyllindrical copper cable carries a current of 1200 A. There is a potential difference of 1.6×10−2 V between two points on the cable that are 0.24 m apart. What is the radius of the cable?

**Physics 2**

The heating element of a clothes dryer has a resistance of 11 and is connnected to a 240-V electrical outlet. What is the current in the heating element? If the clothes dryer is run for 5 minutes, how much energy has been delivered to its heating element?

**Maths**

Width= 12cm because Length= 17cm 12+12+17+17= 58

**math**

suppose c is a subset of d and d is a subset of c. if n(c) = 5, find n (d).

**English 101**

Arriving at Lake Powell in a thunderstorms the campers found it safer to remain in their cars that setting up their tents.

**att DR BOB**

let me rephrase my question. A Mole of ethyl alcohol weights 46g.How many grams of ethyl alcohol are needed to produce 1 L of a 2 milimolar solution? I know the answer is 0.092g but I dont know how to derive it

**chemistry**

how many grams of ethyl alcohol are needed to produce 1 L of a 2 mM solution if 1 mole =46g of ethyl alcohol. how do you calculate?

**Calculus II**

How does one obtain cos2x = cos^2(x) - sin^2(x) by differentiating the identity sin2x = 2sinxcosx

**Computer Applications-87**

how is word used to create the componenet of a research paper

**Algebra**

3(a+2)=4a

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